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MediaDecoder.cpp
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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "MediaDecoder.h"
#include "mozilla/FloatingPoint.h"
#include "mozilla/MathAlgorithms.h"
#include <limits>
#include "nsIObserver.h"
#include "nsTArray.h"
#include "VideoUtils.h"
#include "MediaDecoderStateMachine.h"
#include "ImageContainer.h"
#include "MediaResource.h"
#include "nsError.h"
#include "mozilla/Preferences.h"
#include "mozilla/StaticPtr.h"
#include "nsIMemoryReporter.h"
#include "nsComponentManagerUtils.h"
#include <algorithm>
#include "MediaShutdownManager.h"
#include "AudioChannelService.h"
#include "mozilla/dom/AudioTrack.h"
#include "mozilla/dom/AudioTrackList.h"
#include "mozilla/dom/HTMLMediaElement.h"
#include "mozilla/dom/VideoTrack.h"
#include "mozilla/dom/VideoTrackList.h"
#include "nsPrintfCString.h"
#include "mozilla/Telemetry.h"
using namespace mozilla::dom;
using namespace mozilla::layers;
using namespace mozilla::media;
// Default timeout msecs until try to enter dormant state by heuristic.
static const int DEFAULT_HEURISTIC_DORMANT_TIMEOUT_MSECS = 60000;
namespace mozilla {
// The amount of instability we tollerate in calls to
// MediaDecoder::UpdateEstimatedMediaDuration(); changes of duration
// less than this are ignored, as they're assumed to be the result of
// instability in the duration estimation.
static const uint64_t ESTIMATED_DURATION_FUZZ_FACTOR_USECS = USECS_PER_S / 2;
// avoid redefined macro in unified build
#undef DECODER_LOG
LazyLogModule gMediaDecoderLog("MediaDecoder");
#define DECODER_LOG(x, ...) \
MOZ_LOG(gMediaDecoderLog, LogLevel::Debug, ("Decoder=%p " x, this, ##__VA_ARGS__))
static const char*
ToPlayStateStr(MediaDecoder::PlayState aState)
{
switch (aState) {
case MediaDecoder::PLAY_STATE_START: return "START";
case MediaDecoder::PLAY_STATE_LOADING: return "LOADING";
case MediaDecoder::PLAY_STATE_PAUSED: return "PAUSED";
case MediaDecoder::PLAY_STATE_PLAYING: return "PLAYING";
case MediaDecoder::PLAY_STATE_ENDED: return "ENDED";
case MediaDecoder::PLAY_STATE_SHUTDOWN: return "SHUTDOWN";
default: MOZ_ASSERT_UNREACHABLE("Invalid playState.");
}
return "UNKNOWN";
}
class MediaMemoryTracker : public nsIMemoryReporter
{
virtual ~MediaMemoryTracker();
NS_DECL_THREADSAFE_ISUPPORTS
NS_DECL_NSIMEMORYREPORTER
MOZ_DEFINE_MALLOC_SIZE_OF(MallocSizeOf);
MediaMemoryTracker();
void InitMemoryReporter();
static StaticRefPtr<MediaMemoryTracker> sUniqueInstance;
static MediaMemoryTracker* UniqueInstance() {
if (!sUniqueInstance) {
sUniqueInstance = new MediaMemoryTracker();
sUniqueInstance->InitMemoryReporter();
}
return sUniqueInstance;
}
typedef nsTArray<MediaDecoder*> DecodersArray;
static DecodersArray& Decoders() {
return UniqueInstance()->mDecoders;
}
DecodersArray mDecoders;
public:
static void AddMediaDecoder(MediaDecoder* aDecoder)
{
Decoders().AppendElement(aDecoder);
}
static void RemoveMediaDecoder(MediaDecoder* aDecoder)
{
DecodersArray& decoders = Decoders();
decoders.RemoveElement(aDecoder);
if (decoders.IsEmpty()) {
sUniqueInstance = nullptr;
}
}
};
StaticRefPtr<MediaMemoryTracker> MediaMemoryTracker::sUniqueInstance;
#if defined(PR_LOGGING)
LazyLogModule gMediaTimerLog("MediaTimer");
LazyLogModule gMediaSampleLog("MediaSample");
#endif
void
MediaDecoder::InitStatics()
{
MOZ_ASSERT(NS_IsMainThread());
}
NS_IMPL_ISUPPORTS(MediaMemoryTracker, nsIMemoryReporter)
NS_IMPL_ISUPPORTS0(MediaDecoder)
void
MediaDecoder::ResourceCallback::Connect(MediaDecoder* aDecoder)
{
MOZ_ASSERT(NS_IsMainThread());
mDecoder = aDecoder;
}
void
MediaDecoder::ResourceCallback::Disconnect()
{
MOZ_ASSERT(NS_IsMainThread());
mDecoder = nullptr;
}
MediaDecoderOwner*
MediaDecoder::ResourceCallback::GetMediaOwner() const
{
MOZ_ASSERT(NS_IsMainThread());
return mDecoder ? mDecoder->GetOwner() : nullptr;
}
void
MediaDecoder::ResourceCallback::SetInfinite(bool aInfinite)
{
MOZ_ASSERT(NS_IsMainThread());
if (mDecoder) {
mDecoder->SetInfinite(aInfinite);
}
}
void
MediaDecoder::ResourceCallback::SetMediaSeekable(bool aMediaSeekable)
{
MOZ_ASSERT(NS_IsMainThread());
if (mDecoder) {
mDecoder->SetMediaSeekable(aMediaSeekable);
}
}
void
MediaDecoder::ResourceCallback::ResetConnectionState()
{
MOZ_ASSERT(NS_IsMainThread());
if (mDecoder) {
mDecoder->ResetConnectionState();
}
}
nsresult
MediaDecoder::ResourceCallback::FinishDecoderSetup(MediaResource* aResource)
{
MOZ_ASSERT(NS_IsMainThread());
return mDecoder ? mDecoder->FinishDecoderSetup(aResource) : NS_ERROR_FAILURE;
}
void
MediaDecoder::ResourceCallback::NotifyNetworkError()
{
MOZ_ASSERT(NS_IsMainThread());
if (mDecoder) {
mDecoder->NetworkError();
}
}
void
MediaDecoder::ResourceCallback::NotifyDecodeError()
{
RefPtr<ResourceCallback> self = this;
nsCOMPtr<nsIRunnable> r = NS_NewRunnableFunction([=] () {
if (self->mDecoder) {
self->mDecoder->DecodeError();
}
});
AbstractThread::MainThread()->Dispatch(r.forget());
}
void
MediaDecoder::ResourceCallback::NotifyDataArrived()
{
MOZ_ASSERT(NS_IsMainThread());
if (mDecoder) {
mDecoder->NotifyDataArrived();
}
}
void
MediaDecoder::ResourceCallback::NotifyBytesDownloaded()
{
MOZ_ASSERT(NS_IsMainThread());
if (mDecoder) {
mDecoder->NotifyBytesDownloaded();
}
}
void
MediaDecoder::ResourceCallback::NotifyDataEnded(nsresult aStatus)
{
RefPtr<ResourceCallback> self = this;
nsCOMPtr<nsIRunnable> r = NS_NewRunnableFunction([=] () {
if (!self->mDecoder) {
return;
}
self->mDecoder->NotifyDownloadEnded(aStatus);
if (NS_SUCCEEDED(aStatus)) {
HTMLMediaElement* element = self->GetMediaOwner()->GetMediaElement();
if (element) {
element->DownloadSuspended();
}
// NotifySuspendedStatusChanged will tell the element that download
// has been suspended "by the cache", which is true since we never
// download anything. The element can then transition to HAVE_ENOUGH_DATA.
self->mDecoder->NotifySuspendedStatusChanged();
}
});
AbstractThread::MainThread()->Dispatch(r.forget());
}
void
MediaDecoder::ResourceCallback::NotifyPrincipalChanged()
{
MOZ_ASSERT(NS_IsMainThread());
if (mDecoder) {
mDecoder->NotifyPrincipalChanged();
}
}
void
MediaDecoder::ResourceCallback::NotifySuspendedStatusChanged()
{
MOZ_ASSERT(NS_IsMainThread());
if (mDecoder) {
mDecoder->NotifySuspendedStatusChanged();
}
}
void
MediaDecoder::ResourceCallback::NotifyBytesConsumed(int64_t aBytes,
int64_t aOffset)
{
RefPtr<ResourceCallback> self = this;
nsCOMPtr<nsIRunnable> r = NS_NewRunnableFunction([=] () {
if (self->mDecoder) {
self->mDecoder->NotifyBytesConsumed(aBytes, aOffset);
}
});
AbstractThread::MainThread()->Dispatch(r.forget());
}
void
MediaDecoder::NotifyOwnerActivityChanged()
{
MOZ_ASSERT(NS_IsMainThread());
if (mShuttingDown) {
return;
}
UpdateDormantState(false /* aDormantTimeout */, false /* aActivity */);
// Start dormant timer if necessary
StartDormantTimer();
}
bool
MediaDecoder::IsHeuristicDormantSupported() const
{
MOZ_ASSERT(NS_IsMainThread());
return
#if defined(MOZ_EME)
// We disallow dormant for encrypted media until bug 1181864 is fixed.
mInfo &&
!mInfo->IsEncrypted() &&
#endif
mIsHeuristicDormantSupported;
}
void
MediaDecoder::UpdateDormantState(bool aDormantTimeout, bool aActivity)
{
MOZ_ASSERT(NS_IsMainThread());
if (mShuttingDown ||
!mDecoderStateMachine ||
mPlayState == PLAY_STATE_SHUTDOWN ||
!mOwner->GetVideoFrameContainer() ||
(mOwner->GetMediaElement() && mOwner->GetMediaElement()->IsBeingDestroyed()) ||
!mDormantSupported)
{
return;
}
DECODER_LOG("UpdateDormantState aTimeout=%d aActivity=%d mIsDormant=%d "
"ownerActive=%d ownerHidden=%d mIsHeuristicDormant=%d "
"mPlayState=%s encrypted=%s",
aDormantTimeout, aActivity, mIsDormant, mOwner->IsActive(),
mOwner->IsHidden(), mIsHeuristicDormant, PlayStateStr(),
(!mInfo ? "Unknown" : (mInfo->IsEncrypted() ? "1" : "0")));
bool prevDormant = mIsDormant;
mIsDormant = false;
if (!mOwner->IsActive()) {
mIsDormant = true;
}
#ifdef MOZ_WIDGET_GONK
if (mOwner->IsHidden()) {
mIsDormant = true;
}
#endif
// Try to enable dormant by idle heuristic, when the owner is hidden.
bool prevHeuristicDormant = mIsHeuristicDormant;
mIsHeuristicDormant = false;
if (IsHeuristicDormantSupported() && mOwner->IsHidden()) {
if (aDormantTimeout && !aActivity &&
(mPlayState == PLAY_STATE_PAUSED || IsEnded())) {
// Enable heuristic dormant
mIsHeuristicDormant = true;
} else if(prevHeuristicDormant && !aActivity) {
// Continue heuristic dormant
mIsHeuristicDormant = true;
}
if (mIsHeuristicDormant) {
mIsDormant = true;
}
}
if (prevDormant == mIsDormant) {
// No update to dormant state
return;
}
if (mIsDormant) {
DECODER_LOG("UpdateDormantState() entering DORMANT state");
// enter dormant state
mDecoderStateMachine->DispatchSetDormant(true);
if (IsEnded()) {
mWasEndedWhenEnteredDormant = true;
}
mNextState = mPlayState;
ChangeState(PLAY_STATE_LOADING);
} else {
DECODER_LOG("UpdateDormantState() leaving DORMANT state");
// exit dormant state
mDecoderStateMachine->DispatchSetDormant(false);
}
}
void
MediaDecoder::DormantTimerExpired(nsITimer* aTimer, void* aClosure)
{
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(aClosure);
MediaDecoder* decoder = static_cast<MediaDecoder*>(aClosure);
decoder->UpdateDormantState(true /* aDormantTimeout */,
false /* aActivity */);
}
void
MediaDecoder::StartDormantTimer()
{
MOZ_ASSERT(NS_IsMainThread());
if (!IsHeuristicDormantSupported()) {
return;
}
if (mIsHeuristicDormant ||
mShuttingDown ||
!mOwner->IsHidden() ||
(mPlayState != PLAY_STATE_PAUSED &&
!IsEnded()))
{
return;
}
if (!mDormantTimer) {
mDormantTimer = do_CreateInstance("@mozilla.org/timer;1");
}
mDormantTimer->InitWithFuncCallback(&MediaDecoder::DormantTimerExpired,
this,
mHeuristicDormantTimeout,
nsITimer::TYPE_ONE_SHOT);
}
void
MediaDecoder::CancelDormantTimer()
{
MOZ_ASSERT(NS_IsMainThread());
if (mDormantTimer) {
mDormantTimer->Cancel();
}
}
void
MediaDecoder::Pause()
{
MOZ_ASSERT(NS_IsMainThread());
if (mPlayState == PLAY_STATE_LOADING ||
IsEnded()) {
mNextState = PLAY_STATE_PAUSED;
return;
}
ChangeState(PLAY_STATE_PAUSED);
}
void
MediaDecoder::SetVolume(double aVolume)
{
MOZ_ASSERT(NS_IsMainThread());
mVolume = aVolume;
}
void
MediaDecoder::AddOutputStream(ProcessedMediaStream* aStream,
bool aFinishWhenEnded)
{
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(mDecoderStateMachine, "Must be called after Load().");
mDecoderStateMachine->AddOutputStream(aStream, aFinishWhenEnded);
}
void
MediaDecoder::RemoveOutputStream(MediaStream* aStream)
{
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(mDecoderStateMachine, "Must be called after Load().");
mDecoderStateMachine->RemoveOutputStream(aStream);
}
double
MediaDecoder::GetDuration()
{
MOZ_ASSERT(NS_IsMainThread());
return mDuration;
}
AbstractCanonical<media::NullableTimeUnit>*
MediaDecoder::CanonicalDurationOrNull()
{
MOZ_ASSERT(mDecoderStateMachine);
return mDecoderStateMachine->CanonicalDuration();
}
void
MediaDecoder::SetInfinite(bool aInfinite)
{
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(!mShuttingDown);
mInfiniteStream = aInfinite;
DurationChanged();
}
bool
MediaDecoder::IsInfinite()
{
MOZ_ASSERT(NS_IsMainThread());
return mInfiniteStream;
}
MediaDecoder::MediaDecoder(MediaDecoderOwner* aOwner)
: mWatchManager(this, AbstractThread::MainThread())
, mDormantSupported(false)
, mLogicalPosition(0.0)
, mDuration(std::numeric_limits<double>::quiet_NaN())
, mResourceCallback(new ResourceCallback())
#ifdef MOZ_EME
, mCDMProxyPromise(mCDMProxyPromiseHolder.Ensure(__func__))
#endif
, mIgnoreProgressData(false)
, mInfiniteStream(false)
, mOwner(aOwner)
, mFrameStats(new FrameStatistics())
, mVideoFrameContainer(aOwner->GetVideoFrameContainer())
, mPlaybackStatistics(new MediaChannelStatistics())
, mPinnedForSeek(false)
, mShuttingDown(false)
, mPausedForPlaybackRateNull(false)
, mMinimizePreroll(false)
, mMediaTracksConstructed(false)
, mFiredMetadataLoaded(false)
, mIsDormant(false)
, mWasEndedWhenEnteredDormant(false)
, mIsHeuristicDormantSupported(
Preferences::GetBool("media.decoder.heuristic.dormant.enabled", false))
, mHeuristicDormantTimeout(
Preferences::GetInt("media.decoder.heuristic.dormant.timeout",
DEFAULT_HEURISTIC_DORMANT_TIMEOUT_MSECS))
, mIsHeuristicDormant(false)
, mStateMachineIsShutdown(AbstractThread::MainThread(), true,
"MediaDecoder::mStateMachineIsShutdown (Mirror)")
, mBuffered(AbstractThread::MainThread(), TimeIntervals(),
"MediaDecoder::mBuffered (Mirror)")
, mNextFrameStatus(AbstractThread::MainThread(),
MediaDecoderOwner::NEXT_FRAME_UNINITIALIZED,
"MediaDecoder::mNextFrameStatus (Mirror)")
, mCurrentPosition(AbstractThread::MainThread(), 0,
"MediaDecoder::mCurrentPosition (Mirror)")
, mStateMachineDuration(AbstractThread::MainThread(), NullableTimeUnit(),
"MediaDecoder::mStateMachineDuration (Mirror)")
, mPlaybackPosition(AbstractThread::MainThread(), 0,
"MediaDecoder::mPlaybackPosition (Mirror)")
, mVolume(AbstractThread::MainThread(), 0.0,
"MediaDecoder::mVolume (Canonical)")
, mPlaybackRate(AbstractThread::MainThread(), 1.0,
"MediaDecoder::mPlaybackRate (Canonical)")
, mPreservesPitch(AbstractThread::MainThread(), true,
"MediaDecoder::mPreservesPitch (Canonical)")
, mEstimatedDuration(AbstractThread::MainThread(), NullableTimeUnit(),
"MediaDecoder::mEstimatedDuration (Canonical)")
, mExplicitDuration(AbstractThread::MainThread(), Maybe<double>(),
"MediaDecoder::mExplicitDuration (Canonical)")
, mPlayState(AbstractThread::MainThread(), PLAY_STATE_LOADING,
"MediaDecoder::mPlayState (Canonical)")
, mNextState(AbstractThread::MainThread(), PLAY_STATE_PAUSED,
"MediaDecoder::mNextState (Canonical)")
, mLogicallySeeking(AbstractThread::MainThread(), false,
"MediaDecoder::mLogicallySeeking (Canonical)")
, mSameOriginMedia(AbstractThread::MainThread(), false,
"MediaDecoder::mSameOriginMedia (Canonical)")
, mPlaybackBytesPerSecond(AbstractThread::MainThread(), 0.0,
"MediaDecoder::mPlaybackBytesPerSecond (Canonical)")
, mPlaybackRateReliable(AbstractThread::MainThread(), true,
"MediaDecoder::mPlaybackRateReliable (Canonical)")
, mDecoderPosition(AbstractThread::MainThread(), 0,
"MediaDecoder::mDecoderPosition (Canonical)")
, mMediaSeekable(AbstractThread::MainThread(), true,
"MediaDecoder::mMediaSeekable (Canonical)")
, mTelemetryReported(false)
{
MOZ_COUNT_CTOR(MediaDecoder);
MOZ_ASSERT(NS_IsMainThread());
MediaMemoryTracker::AddMediaDecoder(this);
mAudioChannel = AudioChannelService::GetDefaultAudioChannel();
mResourceCallback->Connect(this);
//
// Initialize watchers.
//
// mDuration
mWatchManager.Watch(mStateMachineDuration, &MediaDecoder::DurationChanged);
// mStateMachineIsShutdown
mWatchManager.Watch(mStateMachineIsShutdown, &MediaDecoder::ShutdownBitChanged);
// readyState
mWatchManager.Watch(mPlayState, &MediaDecoder::UpdateReadyState);
mWatchManager.Watch(mNextFrameStatus, &MediaDecoder::UpdateReadyState);
// ReadyState computation depends on MediaDecoder::CanPlayThrough, which
// depends on the download rate.
mWatchManager.Watch(mBuffered, &MediaDecoder::UpdateReadyState);
// mLogicalPosition
mWatchManager.Watch(mCurrentPosition, &MediaDecoder::UpdateLogicalPosition);
mWatchManager.Watch(mPlayState, &MediaDecoder::UpdateLogicalPosition);
mWatchManager.Watch(mLogicallySeeking, &MediaDecoder::UpdateLogicalPosition);
// mIgnoreProgressData
mWatchManager.Watch(mLogicallySeeking, &MediaDecoder::SeekingChanged);
MediaShutdownManager::Instance().Register(this);
}
RefPtr<ShutdownPromise>
MediaDecoder::Shutdown()
{
MOZ_ASSERT(NS_IsMainThread());
if (mShuttingDown) {
return ShutdownPromise::CreateAndResolve(true, __func__);
}
mShuttingDown = true;
mResourceCallback->Disconnect();
#ifdef MOZ_EME
mCDMProxyPromiseHolder.RejectIfExists(true, __func__);
#endif
// This changes the decoder state to SHUTDOWN and does other things
// necessary to unblock the state machine thread if it's blocked, so
// the asynchronous shutdown in nsDestroyStateMachine won't deadlock.
RefPtr<ShutdownPromise> shutdown;
if (mDecoderStateMachine) {
mTimedMetadataListener.Disconnect();
mMetadataLoadedListener.Disconnect();
mFirstFrameLoadedListener.Disconnect();
mOnPlaybackEvent.Disconnect();
mOnSeekingStart.Disconnect();
mOnMediaNotSeekable.Disconnect();
shutdown = mDecoderStateMachine->BeginShutdown()
->Then(AbstractThread::MainThread(), __func__, this,
&MediaDecoder::FinishShutdown,
&MediaDecoder::FinishShutdown)
->CompletionPromise();
}
// Force any outstanding seek and byterange requests to complete
// to prevent shutdown from deadlocking.
if (mResource) {
mResource->Close();
}
CancelDormantTimer();
ChangeState(PLAY_STATE_SHUTDOWN);
MediaShutdownManager::Instance().Unregister(this);
return shutdown ? shutdown : ShutdownPromise::CreateAndResolve(true, __func__);
}
MediaDecoder::~MediaDecoder()
{
MOZ_ASSERT(NS_IsMainThread());
MediaMemoryTracker::RemoveMediaDecoder(this);
UnpinForSeek();
MOZ_COUNT_DTOR(MediaDecoder);
}
void
MediaDecoder::OnPlaybackEvent(MediaEventType aEvent)
{
switch (aEvent) {
case MediaEventType::PlaybackStarted:
mPlaybackStatistics->Start();
break;
case MediaEventType::PlaybackStopped:
mPlaybackStatistics->Stop();
ComputePlaybackRate();
break;
case MediaEventType::PlaybackEnded:
PlaybackEnded();
break;
case MediaEventType::DecodeError:
DecodeError();
break;
case MediaEventType::Invalidate:
Invalidate();
break;
}
}
RefPtr<ShutdownPromise>
MediaDecoder::FinishShutdown()
{
MOZ_ASSERT(NS_IsMainThread());
mDecoderStateMachine->BreakCycles();
SetStateMachine(nullptr);
return ShutdownPromise::CreateAndResolve(true, __func__);
}
MediaResourceCallback*
MediaDecoder::GetResourceCallback() const
{
return mResourceCallback;
}
nsresult
MediaDecoder::OpenResource(nsIStreamListener** aStreamListener)
{
MOZ_ASSERT(NS_IsMainThread());
if (aStreamListener) {
*aStreamListener = nullptr;
}
return mResource->Open(aStreamListener);
}
nsresult
MediaDecoder::Load(nsIStreamListener** aStreamListener)
{
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(mResource, "Can't load without a MediaResource");
nsresult rv = OpenResource(aStreamListener);
NS_ENSURE_SUCCESS(rv, rv);
SetStateMachine(CreateStateMachine());
NS_ENSURE_TRUE(GetStateMachine(), NS_ERROR_FAILURE);
return InitializeStateMachine();
}
nsresult
MediaDecoder::InitializeStateMachine()
{
MOZ_ASSERT(NS_IsMainThread());
NS_ASSERTION(mDecoderStateMachine, "Cannot initialize null state machine!");
nsresult rv = mDecoderStateMachine->Init();
NS_ENSURE_SUCCESS(rv, rv);
// If some parameters got set before the state machine got created,
// set them now
SetStateMachineParameters();
return NS_OK;
}
void
MediaDecoder::SetStateMachineParameters()
{
MOZ_ASSERT(NS_IsMainThread());
if (mMinimizePreroll) {
mDecoderStateMachine->DispatchMinimizePrerollUntilPlaybackStarts();
}
mTimedMetadataListener = mDecoderStateMachine->TimedMetadataEvent().Connect(
AbstractThread::MainThread(), this, &MediaDecoder::OnMetadataUpdate);
mMetadataLoadedListener = mDecoderStateMachine->MetadataLoadedEvent().Connect(
AbstractThread::MainThread(), this, &MediaDecoder::MetadataLoaded);
mFirstFrameLoadedListener = mDecoderStateMachine->FirstFrameLoadedEvent().Connect(
AbstractThread::MainThread(), this, &MediaDecoder::FirstFrameLoaded);
mOnPlaybackEvent = mDecoderStateMachine->OnPlaybackEvent().Connect(
AbstractThread::MainThread(), this, &MediaDecoder::OnPlaybackEvent);
mOnSeekingStart = mDecoderStateMachine->OnSeekingStart().Connect(
AbstractThread::MainThread(), this, &MediaDecoder::SeekingStarted);
mOnMediaNotSeekable = mDecoderStateMachine->OnMediaNotSeekable().Connect(
AbstractThread::MainThread(), this, &MediaDecoder::OnMediaNotSeekable);
}
void
MediaDecoder::SetMinimizePrerollUntilPlaybackStarts()
{
MOZ_ASSERT(NS_IsMainThread());
DECODER_LOG("SetMinimizePrerollUntilPlaybackStarts()");
mMinimizePreroll = true;
// This needs to be called before we init the state machine, otherwise it will
// have no effect.
MOZ_DIAGNOSTIC_ASSERT(!mDecoderStateMachine);
}
nsresult
MediaDecoder::Play()
{
MOZ_ASSERT(NS_IsMainThread());
UpdateDormantState(false /* aDormantTimeout */, true /* aActivity */);
NS_ASSERTION(mDecoderStateMachine != nullptr, "Should have state machine.");
if (mPausedForPlaybackRateNull) {
return NS_OK;
}
if (IsEnded()) {
return Seek(0, SeekTarget::PrevSyncPoint);
} else if (mPlayState == PLAY_STATE_LOADING) {
mNextState = PLAY_STATE_PLAYING;
return NS_OK;
}
ChangeState(PLAY_STATE_PLAYING);
return NS_OK;
}
nsresult
MediaDecoder::Seek(double aTime, SeekTarget::Type aSeekType)
{
MOZ_ASSERT(NS_IsMainThread());
NS_ENSURE_TRUE(!mShuttingDown, NS_ERROR_FAILURE);
UpdateDormantState(false /* aDormantTimeout */, true /* aActivity */);
MOZ_ASSERT(!mIsDormant, "should be out of dormant by now");
MOZ_ASSERT(aTime >= 0.0, "Cannot seek to a negative value.");
int64_t timeUsecs = 0;
nsresult rv = SecondsToUsecs(aTime, timeUsecs);
NS_ENSURE_SUCCESS(rv, rv);
mLogicalPosition = aTime;
mWasEndedWhenEnteredDormant = false;
mLogicallySeeking = true;
SeekTarget target = SeekTarget(timeUsecs, aSeekType);
CallSeek(target);
if (mPlayState == PLAY_STATE_ENDED) {
PinForSeek();
ChangeState(mOwner->GetPaused() ? PLAY_STATE_PAUSED : PLAY_STATE_PLAYING);
}
return NS_OK;
}
void
MediaDecoder::CallSeek(const SeekTarget& aTarget)
{
MOZ_ASSERT(NS_IsMainThread());
mSeekRequest.DisconnectIfExists();
mSeekRequest.Begin(
mDecoderStateMachine->InvokeSeek(aTarget)
->Then(AbstractThread::MainThread(), __func__, this,
&MediaDecoder::OnSeekResolved, &MediaDecoder::OnSeekRejected));
}
double
MediaDecoder::GetCurrentTime()
{
MOZ_ASSERT(NS_IsMainThread());
return mLogicalPosition;
}
already_AddRefed<nsIPrincipal>
MediaDecoder::GetCurrentPrincipal()
{
MOZ_ASSERT(NS_IsMainThread());
return mResource ? mResource->GetCurrentPrincipal() : nullptr;
}
void
MediaDecoder::OnMetadataUpdate(TimedMetadata&& aMetadata)
{
MOZ_ASSERT(NS_IsMainThread());
RemoveMediaTracks();
MetadataLoaded(nsAutoPtr<MediaInfo>(new MediaInfo(*aMetadata.mInfo)),
Move(aMetadata.mTags),
MediaDecoderEventVisibility::Observable);
FirstFrameLoaded(Move(aMetadata.mInfo),
MediaDecoderEventVisibility::Observable);
}
void
MediaDecoder::MetadataLoaded(nsAutoPtr<MediaInfo> aInfo,
nsAutoPtr<MetadataTags> aTags,
MediaDecoderEventVisibility aEventVisibility)
{
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(!mShuttingDown);
DECODER_LOG("MetadataLoaded, channels=%u rate=%u hasAudio=%d hasVideo=%d",
aInfo->mAudio.mChannels, aInfo->mAudio.mRate,
aInfo->HasAudio(), aInfo->HasVideo());
SetMediaSeekable(aInfo->mMediaSeekable);
mInfo = aInfo.forget();
ConstructMediaTracks();
// Make sure the element and the frame (if any) are told about
// our new size.
if (aEventVisibility != MediaDecoderEventVisibility::Suppressed) {
mFiredMetadataLoaded = true;
mOwner->MetadataLoaded(mInfo, nsAutoPtr<const MetadataTags>(aTags.forget()));
}
// Invalidate() will end up calling mOwner->UpdateMediaSize with the last
// dimensions retrieved from the video frame container. The video frame
// container contains more up to date dimensions than aInfo.
// So we call Invalidate() after calling mOwner->MetadataLoaded to ensure
// the media element has the latest dimensions.
Invalidate();
EnsureTelemetryReported();
}
void
MediaDecoder::EnsureTelemetryReported()
{
MOZ_ASSERT(NS_IsMainThread());
if (mTelemetryReported || !mInfo) {
// Note: sometimes we get multiple MetadataLoaded calls (for example
// for chained ogg). So we ensure we don't report duplicate results for
// these resources.
return;
}
nsTArray<nsCString> codecs;
if (mInfo->HasAudio() && !mInfo->mAudio.GetAsAudioInfo()->mMimeType.IsEmpty()) {
codecs.AppendElement(mInfo->mAudio.GetAsAudioInfo()->mMimeType);
}
if (mInfo->HasVideo() && !mInfo->mVideo.GetAsVideoInfo()->mMimeType.IsEmpty()) {
codecs.AppendElement(mInfo->mVideo.GetAsVideoInfo()->mMimeType);
}
if (codecs.IsEmpty()) {
if (mResource->GetContentType().IsEmpty()) {
NS_WARNING("Somehow the resource's content type is empty");
return;
}
codecs.AppendElement(nsPrintfCString("resource; %s", mResource->GetContentType().get()));
}
for (const nsCString& codec : codecs) {
DECODER_LOG("Telemetry MEDIA_CODEC_USED= '%s'", codec.get());
Telemetry::Accumulate(Telemetry::ID::MEDIA_CODEC_USED, codec);
}
mTelemetryReported = true;
}
const char*
MediaDecoder::PlayStateStr()
{
MOZ_ASSERT(NS_IsMainThread());
switch (mPlayState) {
case PLAY_STATE_START: return "PLAY_STATE_START";
case PLAY_STATE_LOADING: return "PLAY_STATE_LOADING";
case PLAY_STATE_PAUSED: return "PLAY_STATE_PAUSED";
case PLAY_STATE_PLAYING: return "PLAY_STATE_PLAYING";
case PLAY_STATE_ENDED: return "PLAY_STATE_ENDED";
case PLAY_STATE_SHUTDOWN: return "PLAY_STATE_SHUTDOWN";
default: return "INVALID_PLAY_STATE";
}
}
void
MediaDecoder::FirstFrameLoaded(nsAutoPtr<MediaInfo> aInfo,
MediaDecoderEventVisibility aEventVisibility)
{
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(!mShuttingDown);
DECODER_LOG("FirstFrameLoaded, channels=%u rate=%u hasAudio=%d hasVideo=%d mPlayState=%s mIsDormant=%d",
aInfo->mAudio.mChannels, aInfo->mAudio.mRate,
aInfo->HasAudio(), aInfo->HasVideo(), PlayStateStr(), mIsDormant);
mInfo = aInfo.forget();
Invalidate();
if (aEventVisibility != MediaDecoderEventVisibility::Suppressed) {
mOwner->FirstFrameLoaded();
}
// This can run cache callbacks.
mResource->EnsureCacheUpToDate();
// The element can run javascript via events
// before reaching here, so only change the
// state if we're still set to the original
// loading state.
if (mPlayState == PLAY_STATE_LOADING && !mIsDormant) {
ChangeState(mNextState);
}
// Run NotifySuspendedStatusChanged now to give us a chance to notice
// that autoplay should run.
NotifySuspendedStatusChanged();
}
nsresult
MediaDecoder::FinishDecoderSetup(MediaResource* aResource)
{
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(!mShuttingDown);
HTMLMediaElement* element = mOwner->GetMediaElement();
NS_ENSURE_TRUE(element, NS_ERROR_FAILURE);
element->FinishDecoderSetup(this, aResource);
return NS_OK;
}
void
MediaDecoder::ResetConnectionState()
{
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(!mShuttingDown);
// Notify the media element that connection gets lost.
mOwner->ResetConnectionState();
// Since we have notified the media element the connection
// lost event, the decoder will be reloaded when user tries
// to play the Rtsp streaming next time.
Shutdown();
}
void
MediaDecoder::NetworkError()
{